JP4078273B2 - Digital shoplifting prevention system, digital shoplifting prevention method, control apparatus, control program, and program recording medium - Google Patents

Description

  The present invention relates to a digital shoplifting prevention system, a digital shoplifting prevention method, a control apparatus, a control program, and a program recording medium for preventing digital shoplifting by illegally photographing a book using a mobile phone with a camera.

In recent years, mobile phones with cameras have been widely used, and the functions of cameras that have been added have been improved (see, for example, Patent Document 1). Along with the improvement of such imaging function, so-called "digital shoplifting" occurs, in which the contents of unpurchased magazines and books are photographed by using a mobile phone with a camera in a bookstore or the like, and the book itself is not purchased, It is becoming a social problem.
JP 2003-259166 A

  However, there is currently no means for preventing such digital shoplifting.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a digital shoplifting prevention system, a digital shoplifting prevention method, a control apparatus, a control program, and the like that can prevent digital shoplifting by a camera-equipped mobile phone. And providing a program recording medium.

  In order to achieve the above object, an invention according to claim 1 is a digital shoplifting prevention system for preventing digital shoplifting to perform illegal photographing using a camera-equipped mobile phone in a predetermined area, and One or more receiving antennas that receive a signal transmitted from the camera-equipped mobile phone when shooting is performed, and a signal that is received by the one or more receiving antennas from the camera-equipped mobile phone And a control device that performs control in accordance with the determination result.

  The control device according to the present invention is an electronic device and includes not only the case of being configured as one device but also the case where each means or each function is appropriately divided into a plurality of devices. .

  According to a second aspect of the present invention, in the first aspect of the invention, when the control device determines that the received signal is a signal transmitted when the camera-equipped mobile phone is photographed, It is further characterized by further comprising at least one of one or a plurality of speakers for generating an alarm within a predetermined area and one or a plurality of monitoring cameras for photographing the vicinity of the transmission point of the signal for a predetermined time.

  The invention according to claim 3 is a digital shoplifting prevention method for preventing digital shoplifting to perform illegal photographing using a camera-equipped mobile phone in a predetermined area, and includes one or a plurality of receiving antennas for receiving radio waves, A digital shoplifting prevention system comprising a control device that controls one or more speakers and one or more monitoring cameras provided in the predetermined area in advance using a signal received by a receiving antenna is provided by a camera-equipped mobile phone. A reception step for receiving a signal transmitted from the camera-equipped mobile phone when photographing is performed, and a signal received in the reception step includes information specific to the signal transmitted along with the photographing of the camera-equipped mobile phone. A determination step for determining whether or not the reception step is performed, and the reception step as a result of the determination performed in this determination step. A speaker control signal generating step for generating an alarm to the one or more speakers when it is determined that the signal received in step 1 is a signal transmitted along with the photographing of the camera-equipped mobile phone, and a control device in advance The position information of the receiving antenna stored in the storage unit included in the camera is read out, the position where the photographing with the camera-equipped mobile phone is taken is determined based on the position information, and the one or a plurality of pictures around the specified position are taken. At least one of the monitoring camera control signal generation steps to be performed by any one of the monitoring cameras is performed.

  According to a fourth aspect of the present invention, in order to prevent digital shoplifting in which unauthorized photographing using a camera-equipped mobile phone is performed within a predetermined area, a signal transmitted by the camera-equipped cellular phone is provided within the predetermined area. A control unit that performs control based on the reception result, the reception unit that processes the signal received from the reception antenna, and the signal processed by the reception unit And a data processing means for determining whether or not the signal is transmitted when shooting is performed using a camera-equipped mobile phone.

  According to a fifth aspect of the present invention, in order to prevent digital shoplifting in which unauthorized photographing using a camera-equipped mobile phone is performed within the predetermined area, a signal transmitted by the camera-equipped cellular phone by photographing is provided within the predetermined area. A control device that receives a signal via one or a plurality of receiving antennas and performs control based on the reception result, receiving means for processing a signal received from the receiving antenna, based on a signal processed by the receiving unit, It is a control program that functions as data processing means for determining whether or not the signal is transmitted when shooting is performed using a camera-equipped mobile phone.

  The invention described in claim 6 is a program recording medium in which the control program according to claim 5 is recorded.

  The program recording medium here means a computer-readable recording medium such as a CD-ROM (Compact Disc Read Only Memory), a flexible disk, a DVD (Digital Versatile Disk), a magneto-optical disk, and a PC card. To do.

  According to the present invention, one or a plurality of receiving antennas for receiving a signal transmitted from the camera-equipped cellular phone when the image is taken by the camera-equipped cellular phone, and a signal received by the one or a plurality of receiving antennas Is provided with a control device that performs control according to the determination result to determine whether or not specific information transmitted from the camera-equipped mobile phone is included. It is possible to provide a digital shoplifting prevention system, a digital shoplifting prevention method, a control device, a control program, and a program recording medium that can be used to prevent digital shoplifting.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing the configuration of a digital shoplifting prevention system according to an embodiment of the present invention. The digital shoplifting prevention system 1 shown in FIG. 1 detects a signal transmitted when a book or the like is photographed by a camera-equipped mobile phone 11 within a predetermined area, and performs subsequent control.

  Specifically, one or more receiving antennas 5 that receive signals transmitted from the camera-equipped mobile phone 11, a control device 3 that receives signals from the receiving antennas 5 and performs subsequent control, and a control device 3 It consists of one or a plurality of speakers 7 that generate an alarm in response to a control command, and one or a plurality of surveillance cameras 9 that operate in response to a control command from the control device 3.

  The control device 3 receives the signal from the receiving antenna 5 and converts the unique code, and at the same time, receives the position information of the receiving antenna 5 as well as the receiving unit 31 and the signal transmitted from the receiving unit 31. Whether the information transmitted from the system control unit 32 and the reception unit 31 that control the entire control device 3 based on the information includes signal-specific information transmitted in conjunction with the photographing by the camera-equipped mobile phone 11 A data processing unit 33 as a data processing means for determining the above, a storage unit 34 as a database for storing at least the reception time of the radio wave at the reception antenna 5 and the position of the reception antenna 5 that received the radio wave according to an instruction from the system control unit 32 It has.

  In the present embodiment, when the signal received by the receiving unit 31 is a signal transmitted in conjunction with shooting by the camera-equipped mobile phone 11, that is, when the data processing unit 33 determines that digital fraud has been performed, An alarm is issued through the speaker 7 and an area in the vicinity where the signal is transmitted is photographed by the monitoring camera 9. For this reason, in addition to the above, the control device 3 receives an alarm issue command from the system control unit 32 and transmits an alarm signal to the speaker 7, and the camera control mobile phone 11 from the system control unit 32. It further includes a monitoring camera control unit 36 that obtains positional information of the receiving antenna 5 that has received the transmitted signal, moves the direction of the monitoring camera 9, and records the video around the receiving antenna 5 that has received the signal in the monitoring camera 9. is doing.

  The control device 3 having the above configuration includes a central processing unit (CPU) having a calculation function and a control function, a main storage device (main memory) having a function of storing programs and data, and It is constituted by a computer which is an electronic device provided with an auxiliary storage device such as a hard disk drive, a flexible disk drive, a CD-ROM drive, a DVD drive, a magneto-optical disk drive, and a PC card drive. Incidentally, the “computer” here includes not only a case of being constituted by one computer but also a case of being constituted by a computer system in which each means or each function is appropriately divided into a plurality of computers. And

  FIG. 2 is a sequence diagram showing a flow of processing executed by the digital shoplifting prevention system having the above configuration. Details of the digital shoplifting prevention method according to this embodiment will be described with reference to FIG.

  When the user of the camera-equipped mobile phone 11 takes a picture by pressing the shutter (step d11), a weak radio wave signal (unique code) is transmitted from the camera-equipped mobile phone 11 (step d12). As this weak signal transmitted in conjunction with the shutter of the camera, for example, a signal having an inherent code at an output level (about 0.1 mW) with a reach distance of about 5 to 10 m is assumed. This unique code may be any code that can be distinguished from surrounding electromagnetic waves by using a pattern by on / off of a specific frequency, mobile phone number information, and the like. On the other hand, it may be configured to be able to specify individual information by assigning an individual unique code, or may be configured to transmit a common signal regardless of the terminal.

  FIG. 3A illustrates an example of the unique code. In the case shown in the figure, an 8-bit fixed pattern “11100101” based on radio wave on / off is set to be transmitted five times continuously when the shutter is activated. Considering the reach distance (about 5 to 10 m), it is sufficient that the output level of the signal to be transmitted is about 1/10 or less of PHS (Personal Handyphone System: registered trademark), that is, about 0.1 mW at most.

  By the way, in general, a camera-equipped mobile phone has a function of appropriately adjusting the output of a signal according to the distance to the base station in order to reduce power consumption. It is possible to set in advance so that a unique code that is not so large is output when the shutter is operated (at the time of shooting). In this sense, the above-described weak signal generating function can be provided without adding a special function to the conventional camera-equipped mobile phone.

  When the control device 3 in the reception waiting state (step d31) receives radio waves via the receiving antenna 5 (YES in step d51 and step d32), the control device 3 performs signal processing (step d33).

  Here, first, reception of a signal by the receiving antenna 5 will be described. The performance of the receiving antenna 5 is appropriately changed according to various conditions such as the monitoring area, the installation condition of the bookcase, and the number of antennas installed in the monitoring area.

  FIG. 4 is a plan view showing a configuration of a monitoring area to which the digital shoplifting prevention system 1 according to this embodiment is applied. The monitoring area 100 shown in the figure includes two book shelves 201 and 203. As a method of installing the receiving antenna 5 in such a monitoring area 100, the following cases can be assumed (see also FIGS. 5 to 7).

(1) When using a receiving antenna having directivity FIG. 5 is an explanatory diagram showing an example of installation of the receiving antenna 5 in the monitoring area 100 in this case. In the figure, in the monitoring area 100, the vicinity of the bookshelves 201 and 203 on which books are placed is enlarged and described. In the case shown in the figure, the receiving antenna 5 has a directivity of 90 degrees forward and backward (the left side of the bookshelf 201 is a place where no book is placed, and is therefore the receiving range of the receiving antennas 5A and 5B. Is omitted). In this case, if four receiving antennas 5A, 5B, 5C, and 5D are installed, a unique code transmitted from a place where digital shoplifting may be performed can be detected without omission.

If a picture is taken by the camera-equipped mobile phone 11 at the point P ₁ in FIG. 5, the reception antennas 5A and 5B receive signals, but the reception signal level of the reception antenna 5A is stronger than that of the reception antenna 5C. Therefore, it is determined that the photographing was performed at a position closer to the bookcase 201 side, that is, near the point P ₁ .

When digital shoplifting is performed by the camera-equipped mobile phone 11 at the point P ₂ , the unique codes can be received by all the reception antennas, and the reception levels of the reception antennas 5A and 5B are the reception antennas 5C and 5D. compared large, yet the reception level since there is no much difference in the receiving antenna 5A and 5B, near the bookshelf 201 side, near the middle of the receiving antenna 5A and 5B, that is, determines that the photographed near point P ₂ has been performed.

When the camera-equipped mobile phone 11 is used at the point P ₃ , the signal is received by the receiving antenna 5C, but this alone may cause the position P ₄ to be erroneously determined. Therefore, the signal transmission position (shooting position) is determined in consideration of information received by the receiving antenna 5A.

(2) When a receiving antenna having no directivity is used FIG. 6 is an explanatory diagram showing an installation example of the receiving antenna 5 having no directivity in the monitoring area 100. Also in this figure, the vicinity of the bookshelves 201 and 203 is shown enlarged as in FIG. In this case as well, if the four receiving antennas 5A, 5B, 5C, and 5D are installed as in (1) above, the unique code transmitted from a place where digital shoplifting may be performed can be detected without omission. it can.

If the camera-equipped mobile phone 11 is used at the point P ₁ , the unique code is received by all the receiving antennas. However, since the receiving level of the receiving antenna 5A is the maximum, this area, that is, near the point P ₁ It can be determined that shooting was performed. Incidentally, the concentric circles in the figure show how the signal propagates when shooting is performed using the camera-equipped mobile phone 11 at the point P ₁ .

Even when the image is taken at the point P ₂ , reception is possible with all the reception antennas, but the reception levels of the reception antennas 5A and 5B are larger than the reception levels of the reception antennas 5C and 5D, and the reception levels of the reception antennas 5A and 5B because so there is no difference, it is determined that near the middle of the receiving antenna 5A and 5B of the bookshelf 201 side, i.e., taken at the point P ₂ has been performed.

When shooting is performed at the location of the point P ₃ , it can be determined that it is in the vicinity of the receiving antenna 5C, but there is a possibility that it is erroneously determined that the transmission was made from the location of the point P ₄ . In this case, the transmission position is specified based on the reception level of the reception antenna 5A (or 5B).

(3) When the receiving antennas are arranged near the boundary of the monitoring area FIG. 7 is an explanatory diagram showing a case where four receiving antennas 5A, 5B, 5C, 5D are arranged so as to surround the monitoring area 100.

In this case, when photographing is performed using the camera-equipped mobile phone 11 in the monitoring area 100 and a radio wave (unique code) is transmitted, the time difference when the signal is received by each of the receiving antennas 5A, 5B, 5C, and 5D. A transmission position is specified based on this. For example, when photographing at a point P ₁ has been performed, and grade line l _AB obtained from the reception time difference of the receiving antennas 5A and 5B, the position of point P ₁ from grade line l _AC obtained from the reception time difference of the receiving antennas 5A and 5C Is identified.

In this method, a system can be constructed by installing at least three receiving antennas 5 so as to surround the monitoring area 100. However, when the system is realized in a monitoring area having a width of about several meters to 10 meters. Needs to detect a time difference of about nanosecond (1 nanosecond = 10 ⁻⁹ seconds), and it is necessary to construct a highly accurate system. However, all the places can be specified as long as they are within the monitoring area 100, and the position can be specified with a certain degree of accuracy even outside the monitoring area 100.

  Incidentally, in FIG. 7, since the shape of the monitoring area 100 is rectangular when viewed from above, four receiving antennas 5A, 5B, 5C, and 5D are respectively installed near the apex angles. If there are only three receiving antennas, the position in the monitoring area 100 can be specified. Therefore, in this case, after the reception antenna having the latest signal arrival time is excluded, the position is specified as described above from the remaining three reception antennas.

  The actual installation method of the receiving antenna 5 is not necessarily limited to the above three cases, and it is needless to say that the receiving antenna 5 can be appropriately changed according to the shape and area of the monitoring area.

  Thereafter, in the control device 3, when the system control unit 32 receives a signal with the receiving antenna 5, it is registered in advance whether the signal is transmitted from the camera-equipped mobile phone 11 in conjunction with the shutter at the time of shooting. The data processing unit 33 determines whether or not the code is a specific code.

  Since the signal received by the receiving antenna 5 is affected by surrounding electromagnetic noise, there is a possibility that the signal is deviated from the transmitted pattern. Therefore, in the case of the unique code shown in FIG. 3A, 8 bits are appropriately extracted from the received signal as a sample, and the error with the fixed code is compared. For example, as shown in FIG. 3B, when the pattern “01011110” is detected, if the first 4 bits are moved backward, it matches the fixed code “11100101” shown in FIG.

  Next, assuming that the pattern “00101111” is detected, if the first 5 bits are moved backward, the pattern matches the fixed code “11100101”.

  When the correspondence with such a fixed code is realized by repeating a predetermined number of times, a received signal wave, a signal output when the camera-equipped mobile phone 11 performs photographing, that is, a unique code (including a signal) is received. (Step d34).

  If the result of determination in step d34 is that the received signal is not a unique code (NO), it returns to the reception waiting state and waits for the next signal to be transmitted.

  On the other hand, if the received signal matches the unique code (YES in step d34), the speaker control unit 35 is alerted and the monitoring camera control unit 36 is based on the position information of the receiving antenna 5. Then, the direction of each monitoring camera 9 is changed, and a control signal for performing photographing for a predetermined time is transmitted to the speaker 7 and the monitoring camera 9 (step d35).

  The speaker 7 outputs an alarm after receiving the control signal (step d71). The warning here can be appropriately selected according to the usage pattern, such as a simple buzzer or a voice.

  On the other hand, the monitoring camera 9 changes the direction to the direction in which the receiving antenna 5 that has received the camera-equipped mobile phone 11 that has transmitted the signal including the unique code is installed according to the control signal from the control device 3, and the signal The video near the place where is transmitted is recorded for a predetermined time (step d91).

  In the control device 3, the system control unit 32 causes the storage unit 34 to store the time when the signal is received and the position information of the receiving antenna 5 (step d36). When the video of the monitoring camera 9 is digital data, the video data captured by the monitoring camera 9 may be further stored in the storage unit 34.

  Meanwhile, a control program for causing the control device 3 to execute the digital shoplifting prevention method according to the present embodiment is stored in the main storage device or the hard disk described above, and is recorded in a computer-readable recording medium (program recording medium). And can be widely distributed. The “recording medium” here refers to a CD-ROM, flexible disk, DVD, magneto-optical disk, PC card, and the like.

  According to one embodiment of the present invention described above, one or a plurality of receiving antennas for receiving a signal transmitted from the camera-equipped mobile phone when shooting is performed by the camera-equipped mobile phone, and the one or a plurality of receive antennas. A mobile phone with a camera by determining whether or not the signal received by the receiving antenna includes information specific to the signal transmitted from the mobile phone with a camera and performing a control according to the determination result It is possible to prevent digital shoplifting by using unique information transmitted from.

  In view of prevention of digital shoplifting, an object of the present invention is to provide a surveillance camera 9 when the main objective is to provide an economical digital shoplifting prevention system with a low cost. Rather, it is sufficient to generate sound from the speaker 7. Thereby, the effect which prevents a user's cheating psychologically can be acquired.

  Also, a conventional shoplifting prevention surveillance camera can be used as the surveillance camera 9 of the present embodiment.

  Furthermore, by assigning a unique code to each camera-equipped mobile phone 11, it is possible to make a configuration in which an individual is completely specified and charged when unauthorized photographing is performed.

  As described above, the present invention can include various embodiments and the like that have the same effects as the above-described one embodiment.

It is a block diagram which shows the structure of the digital shoplifting prevention system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the outline | summary of a process of the digital shoplifting prevention method which concerns on one Embodiment of this invention. It is a figure which shows the example of the intrinsic | native code transmitted from the mobile phone with a camera. It is a top view which shows the outline | summary of a monitoring area. It is explanatory drawing which shows the example of arrangement | positioning of the receiving antenna in a monitoring area. It is explanatory drawing which shows the example of a receiving antenna arrangement | positioning in a monitoring area (2nd example). It is explanatory drawing which shows the example of a receiving antenna arrangement | positioning in a monitoring area (3rd example).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital shoplifting prevention system 3 Control apparatus 5 Receiving antenna 7 Speaker 9 Monitoring camera 11 Camera-equipped mobile phone 31 Receiving part 32 System control part 33 Data processing part 34 Storage part 35 Speaker control part 36 Monitoring camera control part 100 Monitoring area 201, 203 Bookcase

Claims (6)

A digital shoplifting prevention system for preventing digital shoplifting to perform illegal photographing using a camera-equipped mobile phone within a predetermined area,
One or a plurality of receiving antennas for receiving a signal transmitted from the camera-equipped mobile phone when shooting is performed by the camera-equipped mobile phone;
A control device that determines whether or not the signal received by the one or more receiving antennas includes information specific to the signal transmitted from the camera-equipped mobile phone, and performs control according to the determination result. A unique digital shoplifting prevention system. When the control device determines that the received signal is a signal transmitted when shooting is performed by the camera-equipped mobile phone,
The apparatus further comprises at least one of one or a plurality of speakers that generate an alarm in the predetermined area and one or a plurality of monitoring cameras that image a vicinity of the transmission point of the signal for a predetermined time. The digital shoplifting prevention system according to 1. A digital shoplifting prevention method for preventing digital shoplifting to perform illegal photographing using a camera-equipped mobile phone within a predetermined area,
One or a plurality of receiving antennas for receiving radio waves, and a control device for controlling one or a plurality of speakers and one or a plurality of surveillance cameras provided in the predetermined area in advance using signals received by the receiving antennas Digital shoplifting prevention system provided
A reception step of receiving a signal transmitted from the camera-equipped mobile phone when shooting is performed by the camera-equipped mobile phone;
A determination step for determining whether or not the signal received in this reception step includes signal-specific information transmitted along with the photographing of the camera-equipped mobile phone;
As a result of the determination performed in this determination step, if it is determined that the signal received in the reception step is a signal transmitted along with the photographing of the camera-equipped mobile phone,
A speaker control signal generating step for generating an alarm for the one or a plurality of speakers, and the position information of the receiving antenna stored in advance in a storage unit included in the control device, and a camera-equipped mobile phone based on the position information And at least one of the monitoring camera control signal generation steps for causing the one or the plurality of monitoring cameras to perform shooting around the specified position. A feature of digital shoplifting prevention method. In order to prevent digital shoplifting that performs illegal photographing using a camera-equipped mobile phone in a predetermined area, one or a plurality of receiving antennas provided in the predetermined area are transmitted to the signal transmitted by the camera-equipped mobile phone by photographing. A control device that performs control based on the reception result.
Receiving means for processing a signal received from the receiving antenna;
And a data processing means for determining whether or not the signal is transmitted when photographing is performed using a camera-equipped mobile phone based on the signal processed by the receiving unit. . In order to prevent digital shoplifting that performs illegal photographing using a camera-equipped mobile phone in a predetermined area, a signal transmitted by the camera-equipped cellular phone by photographing is transmitted via one or a plurality of receiving antennas provided in the predetermined area. And a control device that performs control based on the reception result.
Receiving means for processing a signal received from the receiving antenna;
Data processing means for determining whether or not the signal is transmitted when photographing is performed using a camera-equipped mobile phone based on the signal processed by the receiving unit;
A control program characterized by functioning as 6. A program recording medium on which the control program according to claim 5 is recorded.

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